Support server as offer

trunk/src/app/srs_app_rtc_conn.cpp

@@ -63,6 +63,7 @@ using namespace std;
 #include <srs_app_statistic.hpp>
 #include <srs_app_pithy_print.hpp>
 #include <srs_service_st.hpp>
+#include <srs_app_janus.hpp>
 
 // The RTP payload max size, reserved some paddings for SRTP as such:
 //      kRtpPacketSize = kRtpMaxPayloadSize + paddings
@@ -90,7 +91,7 @@ static bool is_rtcp(const uint8_t* data, size_t len)
     return (len >= 12) && (data[0] & 0x80) && (data[1] >= 200 && data[1] <= 209);
 }
 
-static string gen_random_str(int len)
+string gen_random_str(int len)
 {
     static string random_table = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
 
@@ -2288,7 +2289,7 @@ SrsRtcSession::SrsRtcSession(SrsRtcServer* s)
     server_ = s;
     dtls_ = new SrsRtcDtls(this);
 
-    session_state = INIT;
+    state_ = INIT;
     last_stun_time = 0;
     sessionStunTimeout = 0;
 
@@ -2328,14 +2329,14 @@ void SrsRtcSession::set_remote_sdp(const SrsSdp& sdp)
     remote_sdp = sdp;
 }
 
-SrsRtcSessionStateType SrsRtcSession::get_session_state()
+SrsRtcSessionStateType SrsRtcSession::state()
 {
-    return session_state;
+    return state_;
 }
 
-void SrsRtcSession::set_session_state(SrsRtcSessionStateType state)
+void SrsRtcSession::set_state(SrsRtcSessionStateType state)
 {
-    session_state = state;
+    state_ = state;
 }
 
 string SrsRtcSession::id()
@@ -2714,13 +2715,13 @@ srs_error_t SrsRtcSession::on_binding_request(SrsStunPacket* r)
         return srs_error_wrap(err, "stun binding response send failed");
     }
 
-    if (get_session_state() == WAITING_STUN) {
+    if (state_ == WAITING_STUN) {
-        set_session_state(DOING_DTLS_HANDSHAKE);
+        state_ = DOING_DTLS_HANDSHAKE;
 
         peer_id_ = sendonly_skt->peer_id();
         server_->insert_into_id_sessions(peer_id_, this);
 
-        set_session_state(DOING_DTLS_HANDSHAKE);
+        state_ = DOING_DTLS_HANDSHAKE;
         srs_trace("rtc session=%s, STUN done, waitting DTLS handshake.", id().c_str());
     }
 
@@ -3242,10 +3243,12 @@ srs_error_t SrsUdpMuxSender::on_reload_rtc_server()
 SrsRtcServer::SrsRtcServer()
 {
     timer = new SrsHourGlass(this, 1 * SRS_UTIME_SECONDS);
+    janus = new SrsJanusServer(this);
 }
 
 SrsRtcServer::~SrsRtcServer()
 {
+    srs_freep(janus);
     srs_freep(timer);
 
     if (true) {
@@ -3342,6 +3345,7 @@ srs_error_t SrsRtcServer::on_udp_packet(SrsUdpMuxSocket* skt)
         srs_verbose("recv stun packet from %s, use-candidate=%d, ice-controlled=%d, ice-controlling=%d",
             skt->peer_id().c_str(), ping.get_use_candidate(), ping.get_ice_controlled(), ping.get_ice_controlling());
 
+        // TODO: FIXME: For ICE trickle, we may get STUN packets before SDP answer, so maybe should response it.
         if (!session) {
             session = find_session_by_username(ping.get_username());
             if (session) {
@@ -3377,8 +3381,9 @@ srs_error_t SrsRtcServer::listen_api()
 {
     srs_error_t err = srs_success;
 
-    // TODO: FIXME: Fetch api from hybrid manager.
+    // TODO: FIXME: Fetch api from hybrid manager, not from SRS.
     SrsHttpServeMux* http_api_mux = _srs_hybrid->srs()->instance()->api_server();
+
     if ((err = http_api_mux->handle("/rtc/v1/play/", new SrsGoApiRtcPlay(this))) != srs_success) {
         return srs_error_wrap(err, "handle play");
     }
@@ -3386,11 +3391,15 @@ srs_error_t SrsRtcServer::listen_api()
     if ((err = http_api_mux->handle("/rtc/v1/publish/", new SrsGoApiRtcPublish(this))) != srs_success) {
         return srs_error_wrap(err, "handle publish");
     }
-
     if ((err = http_api_mux->handle("/rtc/v1/nack/", new SrsGoApiRtcNACK(this))) != srs_success) {
         return srs_error_wrap(err, "handle nack");
     }
 
+    // For Janus style API.
+    if ((err = janus->listen_api()) != srs_success) {
+        return srs_error_wrap(err, "janus listen api");
+    }
+
     return err;
 }
 
@@ -3451,11 +3460,69 @@ srs_error_t SrsRtcServer::create_session(
         }
     }
 
-    // TODO: FIXME: In answer, we should use the same SSRC as in offer.
     session->set_remote_sdp(remote_sdp);
     session->set_local_sdp(local_sdp);
+    session->set_state(WAITING_STUN);
 
-    session->set_session_state(WAITING_STUN);
+    return err;
+}
+
+srs_error_t SrsRtcServer::create_session2(SrsSdp& local_sdp, SrsRtcSession** psession)
+{
+    srs_error_t err = srs_success;
+
+    std::string local_pwd = gen_random_str(32);
+    // TODO: FIXME: Collision detect.
+    std::string local_ufrag = gen_random_str(8);
+
+    SrsRtcSession* session = new SrsRtcSession(this);
+    *psession = session;
+
+    local_sdp.set_ice_ufrag(local_ufrag);
+    local_sdp.set_ice_pwd(local_pwd);
+    local_sdp.set_fingerprint_algo("sha-256");
+    local_sdp.set_fingerprint(SrsDtls::instance()->get_fingerprint());
+
+    // We allows to mock the eip of server.
+    std::vector<string> candidate_ips = get_candidate_ips();
+    for (int i = 0; i < (int)candidate_ips.size(); ++i) {
+        local_sdp.add_candidate(candidate_ips[i], _srs_config->get_rtc_server_listen(), "host");
+    }
+
+    session->set_local_sdp(local_sdp);
+    session->set_state(WAITING_ANSWER);
+
+    return err;
+}
+
+srs_error_t SrsRtcServer::setup_session2(SrsRtcSession* session, SrsRequest* req, const SrsSdp& remote_sdp)
+{
+    srs_error_t err = srs_success;
+
+    if (session->state() != WAITING_ANSWER) {
+        return err;
+    }
+
+    SrsSource* source = NULL;
+
+    // TODO: FIXME: Should refactor it, directly use http server as handler.
+    ISrsSourceHandler* handler = _srs_hybrid->srs()->instance();
+    if ((err = _srs_sources->fetch_or_create(req, handler, &source)) != srs_success) {
+        return srs_error_wrap(err, "create source");
+    }
+
+    // TODO: FIXME: Collision detect.
+    string username = session->get_local_sdp()->get_ice_ufrag() + ":" + remote_sdp.get_ice_ufrag();
+
+    int cid = _srs_context->get_id();
+    if ((err = session->initialize(source, req, false, username, cid)) != srs_success) {
+        return srs_error_wrap(err, "init");
+    }
+
+    map_username_session.insert(make_pair(username, session));
+
+    session->set_remote_sdp(remote_sdp);
+    session->set_state(WAITING_STUN);
 
     return err;
 }

trunk/src/app/srs_app_rtc_conn.hpp

@@ -44,6 +44,9 @@
 #include <openssl/ssl.h>
 #include <srtp2/srtp.h>
 
+// For Alibaba Tenfold.
+class SrsJanusServer;
+
 class SrsUdpMuxSocket;
 class SrsConsumer;
 class SrsStunPacket;
@@ -78,6 +81,8 @@ const uint8_t kSLI  = 2;
 const uint8_t kRPSI = 3;
 const uint8_t kAFB  = 15;
 
+extern std::string gen_random_str(int len);
+
 class SrsNtp
 {
 public:
@@ -99,10 +104,11 @@ enum SrsRtcSessionStateType
 {
     // TODO: FIXME: Should prefixed by enum name.
     INIT = -1,
-    WAITING_STUN = 1,
+    WAITING_ANSWER = 1,
-    DOING_DTLS_HANDSHAKE = 2,
+    WAITING_STUN = 2,
-    ESTABLISHED = 3,
+    DOING_DTLS_HANDSHAKE = 3,
-    CLOSED = 4,
+    ESTABLISHED = 4,
+    CLOSED = 5,
 };
 
 class SrsRtcDtls
@@ -327,7 +333,7 @@ class SrsRtcSession
     friend class SrsRtcPublisher;
 private:
     SrsRtcServer* server_;
-    SrsRtcSessionStateType session_state;
+    SrsRtcSessionStateType state_;
     SrsRtcDtls* dtls_;
     SrsRtcPlayer* player_;
     SrsRtcPublisher* publisher_;
@@ -364,8 +370,8 @@ public:
     void set_local_sdp(const SrsSdp& sdp);
     SrsSdp* get_remote_sdp();
     void set_remote_sdp(const SrsSdp& sdp);
-    SrsRtcSessionStateType get_session_state();
+    SrsRtcSessionStateType state();
-    void set_session_state(SrsRtcSessionStateType state);
+    void set_state(SrsRtcSessionStateType state);
     std::string id();
     std::string peer_id();
     void set_peer_id(std::string v);
@@ -451,6 +457,8 @@ private:
 private:
     std::map<std::string, SrsRtcSession*> map_username_session; // key: username(local_ufrag + ":" + remote_ufrag)
     std::map<std::string, SrsRtcSession*> map_id_session; // key: peerip(ip + ":" + port)
+private:
+    SrsJanusServer* janus;
 public:
     SrsRtcServer();
     virtual ~SrsRtcServer();
@@ -459,14 +467,19 @@ public:
 public:
     // TODO: FIXME: Support gracefully quit.
     // TODO: FIXME: Support reload.
-    virtual srs_error_t listen_udp();
+    srs_error_t listen_udp();
     virtual srs_error_t on_udp_packet(SrsUdpMuxSocket* skt);
+    srs_error_t listen_api();
 public:
-    virtual srs_error_t listen_api();
+    // Peer start offering, we answer it.
     srs_error_t create_session(
         SrsRequest* req, const SrsSdp& remote_sdp, SrsSdp& local_sdp, const std::string& mock_eip, bool publish,
         SrsRtcSession** psession
     );
+    // We start offering, create_session2 to generate offer, setup_session2 to handle answer.
+    srs_error_t create_session2(SrsSdp& local_sdp, SrsRtcSession** psession);
+    srs_error_t setup_session2(SrsRtcSession* session, SrsRequest* req, const SrsSdp& remote_sdp);
+public:
     bool insert_into_id_sessions(const std::string& peer_id, SrsRtcSession* session);
     void check_and_clean_timeout_session();
     int nn_sessions();

trunk/src/app/srs_app_sdp.cpp

@@ -33,6 +33,7 @@ using namespace std;
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_log.hpp>
 
+// TODO: FIXME: Maybe we should use json.encode to escape it?
 const std::string kCRLF = "\\r\\n";
 
 #define FETCH(is,word) \